Lock.



W. E. SPARKS.

LOOK.

APPLICATION FILED JULY 20, 1912.

Patented Mar. 10, 1914 3 5HEBTB-8HBET 1.

WI T NE 5555.-

Many 0 .5%-

A TTORNEYJ'.

' W. E. SPARKS.

LOOK.

APPLIOATION FILED JULY 20, 1912.

Patented Mar. 10, 19M

WITNESSES:

COLUMBIA ILAFOGRAPH 60.. WASHINGTON. r1v c.

3 SHEETS-SHEET 3.

JNVENTOR.

ATTORNEW.

i dTF S PATENT FTCE.

WILLIAM E. SPARKS, OF NEV HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

To all whom it may concern Be it known that I, TVILLIAM E. SPARKS, a citizen of the United States, residing in New Haven, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to locks of the general type illustrated in the patent to WVilliarn J. Carroll, No. 898,434, September 15, 1908.

In the Carroll lock two dead bolts are employed, one intended to be actuated from the inside of the room and the other from the outside. The bolts are interconnected by means of a connecting lever, and the tumblers of the respective bolts are interconnected by means of a slide, to the end, that the protraction of one bolt. when the other bolt is protracted, will result in the retraction of the second bolt, whereupon the first bolt can then be retracted independently.

The present invention has in view the general improvement and simplification of locks of the general type above mentioned, and it contemplates especially certain improvements in the tumbler mechanism of a two bolt lock.

ith these and other ends in view the invention consists in the novel features and con'ibinations of parts to be hereinafter described and claimed.

In the accompanying drawings, in which I have illustrated a preferred form of the invention, Figure 1 shows the lock in elevation with the cap plate removed, both dead bolts being retracted. Fig. 2 is a fragmentary view of the lock showing the outside dead bolt protracted, the inside dead bolt being retracted. Fig. 3 is a view similar to Fig. 2, but showing the tumblers of the respective bolts in their elevated positions prior to the protraction of the inside bolt and the retraction of the outside bolt. Fig. at is a similar view showing the completion of the operation just mentioned. Fig. 5 is a detail vertical section through the tumbler mechanism of the outside bolt, showing the operation of the ordinary change key. Fig. 6 is a vertical section through the tumbler mechanism of the outside bolt, in the position shown in Fig. t, illustrating the operation of the emergency key. Fig. 7 is a fragmentary view of Fig. 1 with the outer tumblers of the key bolt omitted in order to dis- Specification of Letters Patent.

Application filed July 20, 1912.

Patented Mar. 10, 1914.

Serial No. 710,595.

close the master key tumbler. Fig. 8 is an edge view of the tumbler ot' the inside or thumb-turn actuated bolt, and Fig. 9 comprises face and edge views of the various key bits.

Referring to the drawings, the case 10 of the lock is shown as containing a key actuated dead bolt 11 and a thumb-turn actuated dead bolt 12. The bolt 11 is intended to be operated from the outside of the room, while the bolt 12 is intended to be operated from the inside; and the bolt 11 is preferably arranged above the bolt 12, as shown. However, the arrangement in these last men tioned respects may be varied as desired without departing from the scope of the invention.

The bolt 1.2 is operated by a hub or rollback 13 adapted to be engaged by a thumb turn spindle (not shown) of ordinary form. This rollback is provided with an arm 1=1lcooperating with the tumbler 15 ot the thumbturn bolt, which tumbler is mounted for pivotal movement on a post 16. The rollback arm 14 cooperates with a gating 17 at the rear of the bolt 12, and said arm is adapted to raise the tumbler 15 sulliciently to clear the depending lug 18 of said tumbler from the stump 19 of the bolt 12, so that said bolt may be protracted and retracted in the well known manner.

The key bolt 11 is preferably provided with four spring pressed tumblers, 20, 21, 22 and 23. These tumblers are pivoted on a fixed post 2 1, as usual. The tumbler 20 (Fig. 7) is a master key tumbler having a rectangular opening or gating 2O overlying the stump 25 of the key bolt 11. The other tumblers 21, 22, 23 are acted on by the usual springs and have gatings with lugs or projections 26 to block the movement of the bolt in the well known manner. The master key tumbler 20 is provided with an outwardly extending pin or projection 27 supporting the other tumblers from beneath so that when the master key tumbler is raised to a certain extent, the other tumblers will be raised sultieiently to clear the stump 25 "from the lugs 26 so that the bolt can be thrown or retracted.

The bolts 11 and 12 are connected by means of a connecting lever 28, the arrangement being substantially the same as that shown in the aforesaid Carroll patent. The connection of the tumblers of the respective bolts is effected, however, in a different manner. Instead of employing a tumbler bar or slide connecting the ends of the tumblers of the respective bolts, I do away with this part by connecting the tumbler 15 of the thumb-turn actuated bolt directly with the master key tumbler 20, in such a manner that when the tumbler 15 of the thumb-turn bolt is raised, the tumblers of the key bolt will be raised simultaneously, while conversely a raising of the master key tumbler 20 will cause the tumbler of the thumb-turn bolt to be raised simultaneously. The connection between the tumblers 15 and 20 preferably comprises a hook or beak 29 formed integral with the upper intermediate portion of the tumbler 15 fitting over a pin or projection of a depending intermediate portion 20 of the tumbler 20. This form of connection keeps said tumblers in operative engagement with each other at all times while allowing for the movements of the respective tumblers about their pivots. The tumblers overlap each other at the point of connection.

The guest key 31 (Fig. 9) is provided with a bit 32 having side wards 38 and provided with stepped transverse cuts adapted to engage the three ordinary tumblers 21, 22, 23. without, however, engaging the master key tumbler 20, as shown in Fig. 3. The master key (Fig. 9) has a bit 35 formed with an.

intermediate projection 36 to engage and lift the master key tumbler 20. Hence it will be understood that this key instead of directly engaging all the individual tumblers 21, 22, 23, raises these last named tumblers through the intermediary of the master key tumbler having the pin 27 engaging beneath the other tumblers. This is also true of the grand master key 37 (Fig. 9) and the emergency key 38 (Fig. 9) each of which is provided with a similar projection 36 to engage and lift the master key tumbler 20. The differences between the several keys, shown in Fig. 9, as regards the provision of side wards and wheel wards will be clearly apparent to those'skilled in the art. Each of the keys is provided at the respective ends of the bit with wheel wards or bitings eX- cept the emergency key 38, the ends of whose bit are completely cut away, as shown. The purpose of this difference between the emergency key and the other keys will be pointed out in connection with the operation of the lock as a whole, which is substantially as follows: Supposing the parts to be in the position shown in Fig. 1, if it is desired to lock the door from the inside the occupant of the room will throw the thumb-turn hub 13 in an anti-clockwise direction (Fig. 1) by means of the usual thumb-turn or similar instrumentality (not shown). This will raise the tumbler 15 clear of the stump 19, and as the arm 1% engages the gating or recess of the bolt 12, the latter will be protracted, after which it is dead locked in the usual manner by the return of the tumbler 15 into the position shown in Fig. 5. This move ment of the bolt is effective in blocking the operation of the outside bolt 11 by means of the ordinary or change key, the master key, or the grand master key. This result is produced by providing the tail of the inside bolt 12 with an upwardly projecting ward ll which, when said bolt is thrown, takes a position in close proximityto the keyhole 40, as shown in Fig. 5. If the parts are in the position shown in Fig. 5, the change key, master key, or grand master key can be inserted in the keyhole 40, but inasmuch as none of said keys is cut away sufliciently at the end of the bit to pass the blocking mem ber or ward 41, it will be impossible to rotate any of said keys in the keyhole, so that said keys are thereby rendered inoperative to protract the outside bolt. The emergency key 38, however, will protract the outside bolt under these circumstances inasmuch as its bit is completely cut away at the end in such a manner as to clear the ward 11, as shown in dotted lines in Fig. 6. The protraction of the outside bolt by the emergency key will cause the master key tumbler 20 to be lifted, and through the connections 29, 30, the tumbler 15 of the inside bolt will be simultaneously raised, so that the turning of the connecting lever 28 on its pivot will cause the retraction of the inside bolt in the same general manner as in the Carroll lock previously mentioned. It will then be possible to retract the outside bolt independently, as according to the Carroll patent, and the door will be then free to open. It will therefore be understood that when the thumb-turn bolt has been thrown from the inside of the room, the door will be locked against every key of the series except the emergency key. On the other hand, if the door is locked from the outside by any one of the keys, it can be unlocked from the inside, if there is any one in the room, by protracting the inside bolt by means of the thumb-turn thereby retracting the outside bolt. The inside bolt may then be retracted independently, thereby permitting the door to be opened.

When either bolt is protracted in order to retract the other bolt, the tumblers of the respective bolts are raised simultaneously to permit the free movement of the bolts, by means of the direct connection between tumblers of the respective bolts, as previously described. It will also be observed'that the tumbler 15 of the inside bolt is pivoted on the same post 16 on which the connecting lever 28 is pivoted. 1t will be manifest therefore that the results herein noted are produced with theouse of a minimum number of parts, the construction being a simple one which is not apt to get out of order. It will even be noticed that the tumbler for the inside bolt is not provided a special spring, which spring is unnecessary in View of the constant connection of said tumbler with the spring actuated tumblers of the outside bolt.

In order to make the lock reversible, the keyhole 10 for the outside bolt is open at both sides of the case i. c. said keyhole extends through the cap and also through the bottom of the case; and the thumb-turn hub or rollback 13 extends entirely through the case in the same manner as the usual knob rollbacks. It will be understood that when the lock is fitted in the door, one end of the keyhole 40 will be covered by the wood of the door or by one escutcheon, while the opposite end of the thumb-turn rollback will be similarly covered by the wood of the door or by the other escutcheon. These features being well understood in the art, it has not been considered necessary to illustrate them in detail.

lVhile the foregoing description is a detailed one in so far as it concerns the particular embodiment of my invention selected for illustration, it will be understood that the invention is susceptible of numerous other embodiments within the scope of the claims.

lVhat I claim is:

1. In a lock, dead bolts, a plurality of tumblers for one of said bolts, and a tumbler for the other bolt directly connected with one of said first named tumblers; substantially as described.

2. In a lock, dead bolts, a plurality of tumblers for one of said bolts, including a master key tumbler, and a tumbler for the other bolt connected directly with said master key tumbler; substantially as described.

3. In a lock, a key bolt having a plurality of tumblers, including a master key tumbler, and a thumb-turn bolt having a single tumbler, directly connected with said master key tumbler; substantially as described.

t. In a lock, a key bolt, a thumb-turn bolt, a lever connection between said bolts whereby the protraction of one when the other is protracted effects the retraction of said other bolt, a rollback for said thumb-turn bolt, a pivoted tumbler co-acting with said rollback and with said thumb turn bolt, and a plurality of pivoted tumblers for said key bolt, including a master key tumbler directly connected with the tumbler of the thumb-turn bolt; substantially as described.

5. In a lock, dead bolts, a tumbler for one of said bolts having a hooked portion, and a tumbler for the other bolt having a pin or projection engaged by said hooked portion; substantially as described.

6. In a lock, the combination of two dead bolts, means connecting said bolts to move in opposite directions, a tumbler for one of said bolts having an integral hooked portion intermediate of its ends, and a tumbler for the other bolt having a pin or projection engaged by said hooked portion; substantially as described.

7. In a lock, the combination 01 two dead bolts, means connecting said bolts to move in opposite directions, a plurality of pivoted tumblers for one of said bolts, including a master key tumbler having a pin to lift the other tumblers, and a tumbler for the other bolt, said master key tumbler and said last named tumbler being overlapped intermediate of their ends and having direct connection with each other, whereby said tumblers are actuated together when either bolt is operated; substantially as described.

8. In a lock, the combination of two bolts, tumblers for the respective bolts overlapping each other, and means interconnecting said tumblers at a point where they overlap; substantially as described.

9. In a lock, dead bolts located in superposed relation, a tumbler for the upper bolt having a depending portion at its lower part, and a tumbler for the lower bolt having an upwardly directed projection operatively engaged with the depending portion of said first named tumbler to move said tumblers together when either is actuated; substantially as described.

10. In a lock, upper and lower dead bolts, a tumbler tor the upper bolt having a depending portion intermcdiate of its ends, and a tumbler for the lower bolt having a direct connection with said depending portion of the first tumbler; substantially as de scribed.

11. In a lock, dead bolts arranged one above the other, a tumbler for the upper bolt having a depending portion located intermediate oi the ends of said tumbler, and-a tumbler for the lower bolt having an upwardly directed portion intermediate of its ends, in direct engagement with the depending portion of said first tumbler; substantially as described.

12. In a lock, upper and lower dead bolts, a tumbler for one of said bolts having a pin intermediate of its ends, and a tumbler for the other bolt having means to engage said pin; substantially as described.

13. In a lock, dead bolts, a pivoted tumbler for one of said bolts having a pin intermeliialc oi its ends, and a tumbler for the other bolt having a hook intermediate of its ends engaged with said pin, substantially as described.

lel. In a lock, dead bolts, a plurality of pivoted tumblers for one of said bolts, ineluding a master key tumbler having a pin to lift the other tumblers, and a tumbler for the other bolt connected intermediate of its ends with said master key tumbler; substantially as described.

15. In a lock, dead bolts, a pivoted connecting lever therefor, and a tumbler for one of said bolts mounted on the pivot of said connecting lever; substantially as described.

16. In a lock, dead bolts, a pivoted connecting lever therefor, a plurality of pivoted tumblers for one of said dead bolts, and a single tumbler for the other dead bolt, pivoted on the pivot of said connecting lever; substantially as described.

17. In a lock, a key bolt, a thumb-turn bolt, a connecting lever for said bolt-s, a pivot on which said lever is mounted, a tumbler for said thumb-turn bolt mounted on said pivot, and tumblers for said key bolt; substantially as described.

18. In alock, a key bolt, a thumb-turn bolt, a connecting lever for said bolts, a pivot for said connecting lever, a tumbler for said thumb-turn bolt mounted on said pivot, a rollback cooperating with said tumbler and with said thumb-turn bolt, and tumbler mechanism for the key bolt connected With the tumbler of the thumb-turn bolt; substantially as described.

19. In a look, akey bolt, a thumb-turn bolt, a connecting lever for said bolts, a pivot for said connecting lever, a tumbler for said thumb-turn bolt mounted on said pivot, av

rollback cooperating with said tumbler and with said thumb-turn bolt, and tumbler mechanism for the key bolt, including a master key tumbler directly connected with the tumbler of the thumb-turn bolt; substantially as described.

20. In a lock, an inside bolt, a pivoted mounted on the pivot of said first named tumbler; substantially as described.

22. In a lock, dead bolts, a spring pressed tumbler for one of said bolts, and a springless tumbler for the other bolt operatively connected With said first named tumbler and deriving its spring action therefrom; substantially as described.

23. In a lock, dead bolts, a plurality of spring pressed tumblers for one of said bolts, and a single springless tumbler for the other bolt deriving its spring action from said first named tumblers; substantially as described.

241. In a look, a dead bolt, a master key tumbler therefor, a plurality of spring pressed tumblers cooperating with said master key tumbler, a second dead bolt, and a tumbler for said second bolt connected with said master key tumbler and deriving its spring action solely from the aforesaid spring pressed tumblers; substantially as described.

In Witness whereof, I have hereunto set my hand on the 19th day of July, 1912.

WILLIAM E. SPARKS.

lVitnesses LULA B. CARPENTER, J OI-IN H. SHAW.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

